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Discussion in 'Electronic Design' started by panfilero, Dec 29, 2008.

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  1. panfilero

    panfilero Guest


    Does anyone know where I could get a serial cable for RS-232, for
    connecting a 25-pin DCE deivce to a 9-pin DTE device? Are these
    commercially available or would I have to make my own?

  2. panfilero

    panfilero Guest

  3. whit3rd

    whit3rd Guest

    There's a communication error here, somewhere. DCE to
    DTE uses exactly a straight-through cable. DTE usually
    has male connectors, requires a female cable end, and
    DCE usually has female connectors, requires a male cable end.

    Sometimes it's easier to stock 9pin/9pin cables, and add a 9pin/25pin
    adapter as needed. Did your dealer consider this possibility?
  4. First of all, it's EIA- not RS-.
    Secondly, if there are only 9 pins it's not -232.
  5. Jamie

    Jamie Guest

  6. mpm

    mpm Guest

    The early 232 standard did not even specify a connector.
    You could use whatever you wanted.

    The OP should be aware that 232 is anything but "standard".
    MOST devices are indeed compliant, but enough aren't that you will
    occasionally find the need to fake out the handshaking or some other
    nonsense. Easy enough to do with a breakout box though...

    Anyone remember the Kaypro printer?? (As just one famous example of a
    supposedly RS-232 compliant device.)

  7. Jasen Betts

    Jasen Betts Guest

    comes as a standard accessory with many modems.
    Used to be.
    may be easier to buy a 9M-9F cable and a 9F-25M adaptor
    that's another option.
  8. Jasen Betts

    Jasen Betts Guest

    straight through _is_ what you want!

    DTE-DTE or DCE-DCE needs a cross-over cable,
  9. Jasen Betts

    Jasen Betts Guest

    yeah the standard mandates a 25 pin plug, and manages to use most of
    the pins, the PC implements a subset and (these-days) presents it on
    a 9 pin connector.
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